diff --git a/src/app/chat/chat-screen.tsx b/src/app/chat/chat-screen.tsx
index af29ff6e..06fa7182 100644
--- a/src/app/chat/chat-screen.tsx
+++ b/src/app/chat/chat-screen.tsx
@@ -1,18 +1,6 @@
 "use client";
 /**
  * ChatScreen 编排层
- *
- * 子组件职责：
- *   - ChatHeader：顶部栏（游客 banner / 菜单按钮）
- *   - ChatArea：消息列表
- *   - ChatInputBar：输入栏（文字 + 发送 + More）
- *   - PwaInstallOverlay：PWA 安装提示触发器
- *   - BrowserHintOverlay：浏览器提示
- *
- * 鉴权解耦（事件驱动）：
- *   - chat 机器不感知鉴权 / 不管 WebSocket
- *   - auth → chat 的生命周期同步由根级 <ChatAuthSync /> 负责
- *   - ChatScreen 只派生 UI 展示所需的 isGuest
  */
 import { useEffect, useRef, useState } from "react";
 import Image from "next/image";
diff --git a/src/data/services/api/auth_api.ts b/src/data/services/api/auth_api.ts
index 82ab4e6b..7c5f4330 100644
--- a/src/data/services/api/auth_api.ts
+++ b/src/data/services/api/auth_api.ts
@@ -9,19 +9,21 @@ import { z } from "zod";
 import { httpClient } from "./http_client";
 import { ApiPath } from "./api_path";
 import { ApiEnvelope, unwrap } from "./response_helper";
-import { AppleLoginRequest } from "@/data/dto/auth/apple_login_request";
-import { FacebookLoginRequest } from "@/data/dto/auth/facebook_login_request";
-import { FbIdLoginRequest } from "@/data/dto/auth/fb_id_login_request";
-import { GoogleLoginRequest } from "@/data/dto/auth/google_login_request";
-import { GuestLoginRequest } from "@/data/dto/auth/guest_login_request";
-import { GuestLoginResponse } from "@/data/dto/auth/guest_login_response";
-import { LoginRequest } from "@/data/dto/auth/login_request";
-import { LoginResponse } from "@/data/dto/auth/login_response";
-import { RefreshTokenRequest } from "@/data/dto/auth/refresh_token_request";
-import { RefreshTokenResponse } from "@/data/dto/auth/refresh_token_response";
-import { RegisterRequest } from "@/data/dto/auth/register_request";
-import { SendCodeRequest } from "@/data/dto/auth/send_code_request";
-import { User } from "@/data/dto/user/user";
+import {
+  AppleLoginRequest,
+  FacebookLoginRequest,
+  FbIdLoginRequest,
+  GoogleLoginRequest,
+  GuestLoginRequest,
+  GuestLoginResponse,
+  LoginRequest,
+  LoginResponse,
+  RefreshTokenRequest,
+  RefreshTokenResponse,
+  RegisterRequest,
+  SendCodeRequest,
+} from "@/data/dto/auth";
+import { User } from "@/data/dto/user";
 import type { UserData } from "@/data/schemas/user/user";
 import { Logger } from "@/utils";
 
diff --git a/src/data/services/api/chat_api.ts b/src/data/services/api/chat_api.ts
index 5fe6873d..ae780c88 100644
--- a/src/data/services/api/chat_api.ts
+++ b/src/data/services/api/chat_api.ts
@@ -7,14 +7,16 @@
 import { httpClient } from "./http_client";
 import { ApiPath } from "./api_path";
 import { ApiEnvelope, unwrap } from "./response_helper";
-import { ChatHistoryResponse } from "@/data/dto/chat/chat_history_response";
-import { ChatSendResponse } from "@/data/dto/chat/chat_send_response";
-import { ChatSyncData } from "@/data/dto/chat/chat_sync_data";
-import { ChatSyncRequest } from "@/data/dto/chat/chat_sync_request";
-import { ImageUploadResponse } from "@/data/dto/chat/image_upload_response";
-import { SendMessageRequest } from "@/data/dto/chat/send_message_request";
-import { SttData } from "@/data/dto/chat/stt_data";
-import { SyncMessage } from "@/data/dto/chat/sync_message";
+import {
+  ChatHistoryResponse,
+  ChatSendResponse,
+  ChatSyncData,
+  ChatSyncRequest,
+  ImageUploadResponse,
+  SendMessageRequest,
+  SttData,
+  SyncMessage,
+} from "@/data/dto/chat";
 
 export class ChatApi {
   /**
diff --git a/src/data/services/api/metrics_api.ts b/src/data/services/api/metrics_api.ts
index 875b5d06..78ebc402 100644
--- a/src/data/services/api/metrics_api.ts
+++ b/src/data/services/api/metrics_api.ts
@@ -7,8 +7,7 @@
 import { httpClient } from "./http_client";
 import { ApiPath } from "./api_path";
 import { ApiEnvelope, unwrapOptional } from "./response_helper";
-import { AppEvent } from "@/data/dto/metrics/app_event";
-import { PwaEvent } from "@/data/dto/metrics/pwa_event";
+import { AppEvent, PwaEvent } from "@/data/dto/metrics";
 
 export class MetricsApi {
   /**
diff --git a/src/data/services/api/user_api.ts b/src/data/services/api/user_api.ts
index e3ec5e45..7f730a77 100644
--- a/src/data/services/api/user_api.ts
+++ b/src/data/services/api/user_api.ts
@@ -7,11 +7,13 @@
 import { httpClient } from "./http_client";
 import { ApiPath } from "./api_path";
 import { ApiEnvelope, unwrap } from "./response_helper";
-import { CreditsData } from "@/data/dto/user/credits_data";
-import { CreditsHistoryData } from "@/data/dto/user/credits_history_data";
-import { UpdateProfileRequest } from "@/data/dto/user/update_profile_request";
-import { User } from "@/data/dto/user/user";
-import { UserStatsResponse } from "@/data/dto/user/user_stats_response";
+import {
+  CreditsData,
+  CreditsHistoryData,
+  UpdateProfileRequest,
+  User,
+  UserStatsResponse,
+} from "@/data/dto/user";
 import type { UserData } from "@/data/schemas/user/user";
 
 export class UserApi {